[SCSI] scsi: Add missing command definitions

Add definitions for UNMAP, WRITE SAME{16,32} and GET LBA STATUS
commands.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index 63abb06..9129bcf 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -141,6 +141,7 @@
 static const struct value_name_pair serv_in16_arr[] = {
 	{0x10, "Read capacity(16)"},
 	{0x11, "Read long(16)"},
+	{0x12, "Get LBA status"},
 };
 #define SERV_IN16_SZ ARRAY_SIZE(serv_in16_arr)